Vomiting after Feline Leukemia Vaccine in cats

The FDA has received 206 reports of vomiting in cats after Feline Leukemia Vaccine. That is 26% of all reports for this medicine, compared with 18% across reports for all cat medicines.

206Reports

52%Marked serious

47%Recovered

8.3%Died or euthanised

Same dayTypical onset

How soon it started

Same day

111 58%

1–2 days

37 19%

3–7 days

15 7.8%

1–4 weeks

15 7.8%

Over a month

14 7.3%

How the animals did

Recovered

97 47%

Still unwell when reported

63 31%

Died

9 4.4%

Euthanised

8 3.9%

Not known

29 14%

Problems reported at the same time

86 42%

79 38%

41 20%

27 13%

23 11%

23 11%

17 8.3%

17 8.3%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Type: vaccine.

Mild, short-lived lethargy, soreness or a small lump at the injection site are the most commonly reported vaccine reactions.

Questions owners ask

Can Feline Leukemia Vaccine cause vomiting in cats?: 206 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?: In half of the reports with dates, it started within the same day of the first dose.
What should I do?: Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Vomiting with similar medicines

Vomiting after Rabies Vaccine 785 reports · 30% of its reports
Vomiting after Feline Core Vaccine 447 reports · 29% of its reports
Vomiting after Distemper-parvo Vaccine 88 reports · 32% of its reports

All reported side effects of Feline Leukemia Vaccine in cats · Medicines most reported with vomiting